Mechanical movement for pressing machines



Aug. 14. 1928.

E. DAVIS MECHANICAL MOVEMENT FOR PRESSING MACHINES Filed Oct. 16, 1925 2 Sheets-Sheet l INVENTOR.

A TTORNEYfi E. DAVIS MECHANICAL MOVEMENT FOR PRESSING MACHINES 5 2 9 1 6 l v O 0 d e l 1 F INVENTOR. 4444/ A rromvzys reenter Aua 14, 1928.

A 1,680,729 WITEDSTATES ATEN OFFICE. f

ERNEST ZDAVIS, OF SYRACUSE,,NEW ASSIGNOR TO THE PROSPERITY COMPANY ENC OF SYRACUSE, NEW YORK, A CORPORATION OF NEW YORK.

MECHANICAL MOVEMENT EOB I'RESBING MACHINES.

Application filed. October 16, 1825. Serial No. 62,921.

This invention has for its object a particularly simple and eflicient mechanical movement or power transmitting mechamsm particularly adaptable for garment and laundry pressing machines having1 a movablepressmg element as a press ead which moves toward and from a second pr'essmgelement or buck. a The invention consists in the novelfeatures and in the combinations andeonstruc tions hereinafter set forth and claimed.

In describing this invention, reference had to the accompanying drawing wh ch like characters designate corresponding 15 parts in all the views. i t

Figure 1 is a side-elevation, partly in sec tion, of a mechanica shown with its'pressing elements in,

Fi ure 2 is a diagrammatic view illustratt e position of the parts of the mechan ca movement when the pressing machine is open.

Figures 3 and 4 are enlarged detail views of the parts of this mechanical movement and contiguous parts, the arts of the movement bein shown in start ng and final positions in igui'es 3 and 4 respectively and in so certain intermediate positlons in broken 1 designatesthe frame of a pressing mah w w 2 the buck carried by the standard or goose neck 8 mounted on theframe,

4 designates a yoke or leverpivoted atr 5 between its ends, to a standard 6 rising from the frame, the yoke4 carrying the movable press head 7 at itsffront end being connected to the actuating mechanism atits rear end.

Themechanical movement is for. transmitting the power froman actuator or motor to the press head 7 or the yoke4.

The mechanical movement to be presently described acts first with a comparatively powerful lever action to overcome the inertia of the press head 7, yoke 4 and counterweight 8 attached thereto thereafter to act as a crank and connectingrod to move the so press head quickly toward closed position and then apply heavy pressureso that the entire closing movement is even and without shock or jar. a

The pressing machine and parts heretoreesing machine embodying this Frnovement, the machine being;

the extreme fore described may be of any suitable form, size and construction.

The actuator is shown as a piston movable in the cylinder 9 and having its rod 10 a connected to part'of the mechanical movement. The cylinder is suitably carried bythe frame and the motive power may be steam or air or any other medium. The mechanical movement is particularly eflicient when used in connection with a reciprocating actuator or iston as at the beginning of the power stro e of the piston, the inertia of the head 7, yoke 4 and other stationary parts is overcome b a direct thrust and during the intermediate part. of the stroke the head closes easily and rapidly upon small movement of the piston and during final closing of the press maximum pressure is applied during a comparatively great movement of the, piston. Ordinaril the maximum pressure would be applied uring a piston.

This mechanical movement comprises generally a lever, a fulcrum for the lever between the ends thereof, anactuator connected to one end of the lever, a driven element connected to the other end of the lever and means for guidingand causing the lever to act successively as a lever and as a pull link or connecting rod during the power stroke of the actuator, that is, first the lever tilts on its fulcrum to overcome the inertia of the driven part as the head 7 and yoke 4 and thereafter acts as a pull link actuated by a crank movement. a

11 designatesfthe lever and" 11 the fulcrum for the lever between the ends thereof, this fulcrum being provided on the fram'e, one end of the lever being pivoted at 12 'to the piston rod 10 and the other end being connected to the lower end of a driven art as a toggle including a thrust link 13 w ich is pivoted at 14 at its upper end to the rear arm of the yoke 4 and a link 15.

The means for causing the lever to act successively as a lever and a pull link, guides the power end of1the lever so that it has a crank movement for the'pur of straightening a toggle consisting o the thrust link last short part of the stroke of ver 11 is pivotally connected at 17 to the link 15. This means causes the power end of the lever to move in an arc Aand act as a crank, and comprises a link 18 pivoted at one end to the power end of the lever 11, 1t being here'shown as mounted on the pivot 12, and at its other end'at 19to a'point fixed from movement with the lever 11; although this pivotal point 19 shifts slightly relatively to the frame.

As here illustrated, the link 18 is pivoted at one end to a second link 20 which is pivoted at its other end at 21 to the frame. The pivot 21 also supports the fulcrum 11 which is a roller on said pin 21. An adjustable stop 22 carried by the link 20 limits the downward movement of the link 20 and hence the slight shifting movement of the pivot 19, this stop coactlng with a shoulder on the frame. A suitab e spring pressed buffer 23 is carried by the link 20 for coacting with the lever 11 at 24 where the press is closed, this buffer 23 serving to press the link 20 to carry the stop 22 toward the shoulder on the frame as the press is being closed. This spring pressed bufier also serves to start or give a starting impulse to the lever 11 when the flow of motive fluid or air to the cylinder is discontinued or exhausted.

The pivotal points 19 and 15 are located between vertical planes passing through the ends of the lever 11 and are located below mg movement the link 11 moves from the the lever and on the oppositeside of the fulcrum point. The are A of the link 18 and the arc B of the link 15 thus have different centers and the pivotoints 12 and 17 have radii of different lengt s.

When the press is open the link 15 is normally arranged in horizontal position so that the toggle formed by the link 13, 15 is folded, and the link 18 normally stands upright at a right angle or at an acute angle to piston rod 10, the lever 11 rocks on its fulcrum 11 and thus transfers a straight thrust to the link 13 causing the inertia of the head 7, yoke 4 and parts thereto to be instantly overcome, then the head moves quickly to nearly closed position while the link 13 is traveling from the dotted line position shown in Figure 3 to the dotted line position shown in Figure 4. During such closposition shown in full lines Figure 3 toward that shown in Figure 4 in dotted lines.

During the first impulse or thrust of the piston rod 10 and while the lever 11 is initially rocking on its fulcrum 11, the front end of the lever or the pivot point 12 moves downwardly in an almost vertical line. Also, the link 18 moves re'ctilinearly downwardly and while it is so doing, the link 20 swings on its pivot 21 until the adjustable sto 22 engages the shoulder on the frame and limits the downward movement of the link 20 and the link 18. During such straight downward thrust, the inertiaof the head and other parts is overcome. After the stop 22 hottoms on the shoulder on the frame, the swinging or crank movement of the link 18 begins. The links 20 and 18 constitute one form of means for guiding and causing the lever to act successively as alever and as a pull link.

During such closing movement, the lever moves relatively to its fulcrum 12 and lifts off of such fulcrum and acts as a pull link or connectin rod to close the toggle consisting of lin s 13, 15, and the'toggle is completely closed during the final movement of the lever 11 as a pull link, when the link 18 is moving from its osition shown in dotted lines Figure 4, to t at shown in full lines. This link 18 effects a crank action by which the power is being applied while the piston is inmost effective position in the cylinder and. while the link 18' istraveling in a long arc.

One end of the lever 11 moves downwardly in the are A and the other end of the lever moves upwardly in the arc B, these arcs having dlfferent centers and different radii and owing to their arrangement the final pressure is applied through a crank and all link movement.

I at I claim is:

1. A mechanical movement/for transmitting Ipower comprising a lever, a fulcrum for t e lever between the ends thereof, an

actuator pivoted to one end of the lever, a driven element connected to the other end of the lever and means for iding the power end of the lever downwar y in an arc and the other end of the lever upwardl and lifting the same off its fulcrum where y the lever acts as a pull link.

2. mechanical movement comprising a comblned power lever and ull link and a fulcrum for said lever an pull link, an actuator connected at one end of the lever and the pull link and aldriven element connected to the other end of the lever'and pull hnk and means forguidihg the power end of. the lever downwardly in an arc and the driven end of the lPver upwardly in an are havin a different center from the former are w ereby the lever shifts relatively to its fulcrum and acts as a pull link.

3. A mechanical movement for transmitting power comprising a lever, a fulcrum for the lever between the ends thereof, and an actuator connected to one. end of the lever, adriven element connected to the other end of the lever and means for guiding the power end of the lever downwardly in an arc and the driven lever upwardly in an arc, the arcs being of different radius and having different centers whereby the lever initially rocks on its fulcrum to transmit power and thereafter lifts off the fulcrum and acts as a pull link.

4. A mechanical movement for transmitting power comprising a lever, a fulcrum for the lever between the ends thereof, an actuatoracting on one end of the lever and a driven element pivotally connected to the other end of the lever and means for guiding and causing the lever to act successively as a lever and a pull link during the power stroke of the lever.

5. A mechanical movement comprising a frame, a lever fulcrumed on the frame, an actuator connected to one end of the lever, motion transmitting mechanism comprising a link pivoted to the frame and to the other end of .the lever and means for causing the power end of the lever to have a crank like movement and cause the lever to serve as a pull link.

6. A mechanical movement for transmitting power comprising a lever, a fulcrum for the lever between the ends thereof, an actuator acting on one end of the lever and a driven element pivotally connected to the other end of the lever and means for guiding and causing the lever to act successively as a lever and a pull link during the power stroke of the lever, said means comprising a link pivotally connected to the power end of the lever at one end and pivotally connected at its other end to a point fixed from movement with the lever.

7. A mechanical movement for transmitting power comprising a lever, a fulcrum for the lever between the ends thereof, an actuator acting on one end of the lever and a driven element pivotally connected to the other end of the lever, a link pivoted at one end to the lever and at its other end at a point held from movement with the lever and the link normally extending at an acute angle relatively to the lever.

8. A mechanical movement for transmitting power comprising a lever, a fulcrum for the lever between the ends thereof, an

actuator acting on one end of the lever and ment of the second a driven element pivotally connected to the other end of the lever, a link pivoted at one end to the lever and a second link pivoted to the other end of the former link and to a fixed point and a sto for limiting the movelink, the first link normally extending at an acute angle to the lever and being movable during the power stroke into a position approaching a straight line with'the second link.

9. A mechanical'movement for transmitting power comprising a lever, a fulcrum for the lever between the ends thereof, an ac- 'beingi tuator acting on one end of the lever and a driven element pivotally connected to the other end of the lever, a link pivoted at one end to the lever and at its other end at a point held from movement with the lever, the link normally extending at an acute angle relatively to the lever and the third lever pivoted at one end to a fixed point and near its other end to the driven end of the lever, the pivotal points of the links being located between vertical planes passing through the ends of the lever. V

10. A mechanical movement for transmitting power comprising a lever, a fulcrum for the lever between the ends thereof, an actuator acting on one end of the lever and a driven element pivotally connected to the other end of the .lever, a link ivoted at one end to. the lever and a second link pivoted to the other end of the former link and to a fixed point and a sto for limiting the movement of the second link, the first link normally extending at an acute angle to the lever and being movable during the power stroke into a position approaching a straight line with the secondlink and the third lever pivoted at one end to a fixed point and near its other end to the driven end of the lever, the pivotal points of the links being located between vertical planes passing through the ends of the lever.

11. A mechanical movement for transmitting power comprising a frame having a fulcrum, a lever for engagin the fulcrum,

. link.

12. A mechanical movement for transmitting power comprising a frame having a fulcrum, a lever engaging the fulcrum, an actu'ator connected to one end of the lever, a link pivoted at one end to such lever, a second link pivoted to the frame below thelever and extending in the general direction of the lever, the second link being normally arranged at an angle to the firstlink and pivoted thereto, means for limiting the ownward swinging movement of the second link, all whereby the lever is first actu'ated on its fulcrum until the movement of the second link is limited and thereafter the first link acts as a crank.

In testimony whereof, I have hereunto signed my name, at Syracuse, in the county of Onondaga, and in the State of New York, this 14th day of October, 1925.

. ERNEST DAVIS. 

